Contrary to popular belief, doctors say it's impossible to contract the flu from the flu vaccine. With the flu sweeping the nation, there's a big misconception among Americans that getting vaccinated can give you the virus, causing people to avoid the shot.

According to USA Today, 35 percent of CVS consumers think that myth is true. While some get sick after being vaccinated, it's not from the vaccine, which uses dead viruses. Although the vaccine can't get you sick, it is still possible to get the flu post-shot. This year's vaccine protects three strains, and is a 90 percent match for the viruses going around this season.

If you're unlucky and get exposed to a different strain, the shot can't protect you. The CDC says this year's vaccine is about 62 percent effective, which is on point with effectiveness for most years.